<template>
  <div class="pdf-preview">
    <div class="pdf-wrap">
      <vue-pdf-embed :source="state.source" :style="state.scale" class="vue-pdf-embed" :page="state.pageNum" />
    </div>
    <div class="page-tool">
      <div class="page-tool-item" >上一页</div>
      <div class="page-tool-item">下一页</div>
      <div class="page-tool-item">{{state.pageNum}}/{{state.numPages}}</div>
      <div class="page-tool-item" >放大</div>
      <div class="page-tool-item">缩小</div>
    </div>

  </div>
</template>
<script setup lang="ts">
import { reactive, onMounted, computed } from "vue";
import VuePdfEmbed from "vue-pdf-embed";
import { createLoadingTask } from "vue3-pdfjs";

const props = defineProps({
  pdfUrl: {
    type: String,
    required: true
  }
})
const state = reactive({
  source: props.pdfUrl, //预览pdf文件地址
  pageNum: 1, //当前页面
  scale: 1, // 缩放比例
  numPages: 0, // 总页数
});
const loadingTask = createLoadingTask(state.source);
loadingTask.promise.then((pdf:{numPages: number}) => {
  state.numPages = pdf.numPages;
});

onMounted(() => {

});

</script>
<style lang="css" scoped>
.pdf-preview {
    position: relative;
    height: 100vh;
    padding: 20px 0;
    box-sizing: border-box;
    background: rgb(66, 66, 66);
}

.vue-pdf-embed {
    text-align: center;
    width: 515px;
    border: 1px solid #e5e5e5;
    margin: 0 auto;
    box-sizing: border-box;
}

.pdf-preview {
    position: relative;
    height: 100vh;
    padding: 20px 0;
    box-sizing: border-box;
    background-color: #e9e9e9;
}
.pdf-wrap{
    overflow-y:auto ;
}
.vue-pdf-embed {
    text-align: center;
    width: 515px;
    border: 1px solid #e5e5e5;
    margin: 0 auto;
    box-sizing: border-box;
}

.page-tool {
    position: absolute;
    bottom: 35px;
    padding-left: 15px;
    padding-right: 15px;
    display: flex;
    align-items: center;
    background: rgb(66, 66, 66);
    color: white;
    border-radius: 19px;
    z-index: 100;
    cursor: pointer;
    margin-left: 50%;
    transform: translateX(-50%);
}
.page-tool-item {
    padding: 8px 15px;
    padding-left: 10px;
    cursor: pointer;
}

</style>
